McAfee VIRUSSCAN 5.1 User Manual page 99

You can also run the entire VirusScan product in secure mode,
which disables access to all configurable options.
• Display the VShield icon in the Windows system tray. Select the
Show icon in the Taskbar checkbox to have the VShield scanner
display this icon
the icon appears depends on which VShield modules you have
enabled.
Double-clicking the icon opens the VShield Status dialog box.
Right-clicking the icon displays a shortcut menu.
5. Turn on heuristic scanning. Click Advanced to open the Advanced Scan
Settings dialog box
Figure 4-11. Advanced Scan Settings dialog box
Heuristic scanning technology enables the System Scan module to
recognize new viruses based on their resemblance to similar viruses that
the module already knows. To do this, the module looks for certain
"virus-like" characteristics in the files you've asked it to scan. The
presence of a sufficient number of these characteristics in a file leads the
module to identify the file as potentially infected with a new or
previously unidentified virus.
Because the System Scan module looks simultaneously for file
characteristics that rule out the possibility of virus infection, it will rarely
give you a false indication of a virus infection. Therefore, unless you
know that the file does not contain a virus, you should treat "potential"
infections with the same caution you would confirmed infections.
The System Scan module starts out without any heuristic scan options
active. To activate heuristics scanning, follow these substeps:
a. Select the Enable heuristics scanning checkbox. The remaining
options in the dialog box activate.
in the system tray. The particular state in which
(Figure 4-11).
Using the VShield Scanner
User's Guide 99